CN111326859B - Multi-channel terahertz antenna and communication system applying same - Google Patents
Multi-channel terahertz antenna and communication system applying same Download PDFInfo
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- CN111326859B CN111326859B CN202010101611.0A CN202010101611A CN111326859B CN 111326859 B CN111326859 B CN 111326859B CN 202010101611 A CN202010101611 A CN 202010101611A CN 111326859 B CN111326859 B CN 111326859B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/02—Waveguide horns
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/06—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens
- H01Q19/08—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens for modifying the radiation pattern of a radiating horn in which it is located
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/104—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces using a substantially flat reflector for deflecting the radiated beam, e.g. periscopic antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/064—Two dimensional planar arrays using horn or slot aerials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
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- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a multi-channel terahertz antenna and a communication system applying the same. The multichannel terahertz antenna comprises a plurality of low-frequency units, a plurality of high-frequency units and a metal reflecting plate; the low-frequency unit comprises a first microwave lens, a first horn antenna, a first orthogonal polarizer and a first waveguide feed interface which are sequentially connected from top to bottom; the high-frequency unit comprises a second microwave lens, a second horn antenna, a second orthogonal polarizer and a second waveguide feed interface which are sequentially connected from top to bottom; the first horn antenna and the second horn antenna are fixed on the upper surface of the metal reflecting plate; the first orthogonal polarizer and the second orthogonal polarizer are both fixed on the lower surface of the metal reflecting plate. The invention can carry out simultaneous same-frequency transceiving through a plurality of mutually independent communication channels, further increase the channel capacity and improve the communication rate.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to a multi-channel terahertz antenna and a communication system applying the same.
Background
Because the existing antenna mainly works in a frequency band below terahertz and is limited by the working frequency of the antenna, the antenna technology such as a Multiple Input Multiple Output (MIMO) antenna, an antenna array and the like is usually applied, namely, a mode of complementing multiple antennas is adopted to increase the channel capacity, or a mode of forming an array by multiple antennas is adopted to improve the communication direction, so that the communication rate is improved. However, in the prior art, the plurality of communication channels are not independent from each other, so that simultaneous common-frequency transceiving cannot be performed through the plurality of independent communication channels, and it is difficult to further increase the channel capacity and improve the communication rate.
Disclosure of Invention
The invention provides a multi-channel terahertz antenna and a communication system applying the same, which overcome the defects of the prior art.
In order to solve the above technical problem, an embodiment of the present invention provides a multi-channel terahertz antenna, including a plurality of low frequency units, a plurality of high frequency units, and a metal reflector;
the low-frequency unit comprises a first microwave lens, a first horn antenna, a first orthogonal polarizer and a first waveguide feed interface which are sequentially connected from top to bottom;
the high-frequency unit comprises a second microwave lens, a second horn antenna, a second orthogonal polarizer and a second waveguide feed interface which are sequentially connected from top to bottom;
the first horn antenna and the second horn antenna are fixed on the upper surface of the metal reflecting plate;
the first orthogonal polarizer and the second orthogonal polarizer are both fixed on the lower surface of the metal reflecting plate.
Further, the fixed positions of the first horn antenna and the second horn antenna on the upper surface of the metal reflecting plate satisfy the following conditions:
the spacing distance between two adjacent first horn antennas reaches the maximum, and the spacing distance between two adjacent second horn antennas reaches the maximum; and the spacing distance between two adjacent first horn antennas is greater than that between two adjacent second horn antennas.
Further, the first waveguide feed interface and the second waveguide feed interface are both composed of two waveguide feed interfaces.
Another embodiment of the present invention provides a communication system using a multi-channel terahertz antenna, including a transmitting end and a receiving end; the transmitting end is provided with a transmitting antenna, and the receiving end is provided with a receiving antenna; wherein the transmitting antenna and the receiving antenna are both multi-channel terahertz antennas as described above;
the transmitting antenna is used for transmitting radio frequency signals to the receiving end;
the receiving antenna is used for receiving the radio frequency signal.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
the low-frequency unit is obtained by sequentially connecting a first microwave lens, a first horn antenna, a first orthogonal polarizer and a first waveguide feed interface from top to bottom, the second microwave lens, a second horn antenna, a second orthogonal polarizer and a second waveguide feed interface are sequentially connected from top to bottom, the high-frequency unit is obtained, a plurality of low-frequency units and a plurality of high-frequency units are fixed on the metal reflecting plate, the multi-channel terahertz antenna is obtained, the respective sending signals are respectively converged by the plurality of low-frequency units and the plurality of high-frequency units, the beam width of the respective sending signals is reduced, the phenomenon of signal interference of the plurality of communication channels is avoided, mutual independence among the plurality of communication channels is ensured, simultaneous receiving and sending common frequency through the plurality of mutually independent communication channels is realized, the channel capacity is further increased, and the communication rate is improved.
Drawings
Fig. 1 is a schematic overall structure diagram of a multi-channel terahertz antenna according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a low frequency unit according to a first embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a high-frequency unit according to a first embodiment of the present invention;
fig. 4 is a schematic top view of a multi-channel terahertz antenna according to a first embodiment of the present invention;
fig. 5 is a schematic bottom view of a multi-channel terahertz antenna according to a first embodiment of the present invention;
fig. 6 is a schematic side view of a multi-channel terahertz antenna according to a first embodiment of the present invention;
fig. 7 is a schematic structural diagram of a communication system using a multi-channel terahertz antenna according to a second embodiment of the present invention.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A first embodiment. Please refer to fig. 1-6.
As shown in fig. 1 to 3, the first embodiment provides a multi-channel terahertz antenna, which includes a plurality of low-frequency units 10, a plurality of high-frequency units 20, and a metal reflection plate 30; the low-frequency unit 10 comprises a first microwave lens 101, a first horn antenna 102, a first orthogonal polarizer 103 and a first waveguide feed interface 104 which are sequentially connected from top to bottom; the high-frequency unit 20 comprises a second microwave lens 201, a second horn antenna 202, a second orthogonal polarizer 203 and a second waveguide feed interface 204 which are sequentially connected from top to bottom; the first horn antenna 102 and the second horn antenna 202 are both fixed on the upper surface of the metal reflector 30; the first orthogonal polarizer 103 and the second orthogonal polarizer 203 are fixed to the lower surface of the metal reflection plate 30.
It should be noted that the multichannel terahertz antenna operates in the terahertz frequency band. Wherein, 140GHz approved by the world radio society is selected as low frequency, 220GHz is selected as high frequency, namely the selection range of the working frequency is 140 GHz-220 GHz.
In the present embodiment, the multi-channel terahertz antenna includes four low-frequency units 10, four high-frequency units 20, and a metal reflection plate 30. The size of the metal reflection plate 30 is 1.4m × 1.4m, and the material includes stainless steel.
The low-frequency unit 10 is obtained by sequentially connecting a first microwave lens 101, a first horn antenna 102, a first orthogonal polarizer 103 and a first waveguide feed interface 104 from top to bottom, the first waveguide feed interface 104 transmits the two acquired signals to the first orthogonal polarizer 103, the first orthogonal polarizer 103 transmits a synthesized signal of the two signals to the first horn antenna 102, the first horn antenna 102 transmits the synthesized signal as a sending signal to the first microwave lens 101, and the first microwave lens 101 converges the sending signal, so that the beam width of the sending signal is reduced.
Similarly, the high frequency unit 20 is obtained by sequentially connecting the second microwave lens 201, the second horn antenna 202, the second orthogonal polarizer 203, and the second waveguide feed interface 204 from top to bottom, the second waveguide feed interface 204 transmits the two acquired signals to the second orthogonal polarizer 203, the second orthogonal polarizer 203 transmits a synthesized signal of the two signals to the second horn antenna 202, the second horn antenna 202 transmits the synthesized signal as a transmission signal to the second microwave lens 201, and the second microwave lens 201 converges the transmission signal, thereby reducing the beam width of the transmission signal.
The horn antenna is a planar antenna, and a microwave antenna with a circular or rectangular section with gradually-changed and opened waveguide tube terminals is the most widely used microwave antenna, and has the advantages of simple structure, wide frequency band, large power capacity and convenience in adjustment and use. Since the band width of the horn antenna itself is large, the low frequency unit 10 and the high frequency unit 20 should have a large separation distance at the fixed positions on the upper surface of the metal reflection plate 30.
By fixing the first horn antenna 102 and the second horn antenna 202 on the upper surface of the metal reflection plate 30 and corresponding to the fixing positions of the first horn antenna 102 and the second horn antenna 202 on the upper surface of the metal reflection plate 30, the first orthogonal polarizer 103 and the second orthogonal polarizer 203 are fixed on the lower surface of the metal reflection plate 30, so as to fix the four low frequency units 10 and the four high frequency units 20 on the upper surface of the metal reflection plate 30.
In the embodiment, the multichannel terahertz antenna works in the terahertz frequency band, and the characteristic that terahertz communication has sparse channels (the beam width is less than 5 degrees) is utilized, so that the phenomenon of signal interference of a plurality of communication channels is avoided, and mutual independence among the plurality of communication channels is ensured. Through setting up the cross polarization ware in low frequency unit 10 and high frequency unit 20, by the cross polarization ware with two routes signal composition one way signal, be favorable to guaranteeing two routes signal mutual noninterference, and the number of channels increases one time, set up horn antenna in low frequency unit 10 and high frequency unit 20, can make theoretical gain reach about 24dBi, the beam width is 7, set up microwave lens in low frequency unit 10 and high frequency unit 20, send the signal by the microwave lens convergence, can make theoretical gain reach about 30dBi, the beam width reduces to 5, be favorable to guaranteeing that the isolation of two adjacent horn antenna is greater than 30 dB. By reasonably fixing the low-frequency unit 10 and the high-frequency unit 20 on the metal reflecting plate 30, the phenomenon of signal interference of a plurality of communication channels is avoided, and mutual independence between the plurality of communication channels is ensured, so that simultaneous same-frequency transceiving is realized through the plurality of mutually independent communication channels, the channel capacity is further increased, and the communication rate is improved.
In this embodiment, the first microwave lens 101, the first horn antenna 102, the first orthogonal polarizer 103, and the first waveguide feed interface 104 are sequentially connected from top to bottom to obtain the low frequency unit 10, the second microwave lens 201, the second horn antenna 202, the second orthogonal polarizer 203, and the second waveguide feed interface 204 are sequentially connected from top to bottom to obtain the low frequency unit 20, and the plurality of low frequency units 10 and the plurality of high frequency units 20 are fixed to the metal reflection plate 30 to obtain the multi-channel terahertz antenna, so that the plurality of low frequency units 10 and the plurality of high frequency units 20 respectively converge respective transmission signals, the beam width of the respective transmission signals is reduced, the signal interference phenomenon in the plurality of communication channels is avoided, the plurality of communication channels are ensured to be independent from each other, thereby realizing simultaneous co-frequency transceiving through the plurality of independent communication channels, and further increasing the channel capacity, the communication rate is improved.
As shown in fig. 4 to 6, in the present embodiment, the fixing positions of the first horn antenna 102 and the second horn antenna 202 on the upper surface of the metal reflection plate 30 satisfy the following conditions: the spacing distance between two adjacent first horn antennas 102 is maximized, and the spacing distance between two adjacent second horn antennas 202 is maximized; wherein, the spacing distance between two adjacent first horn antennas 102 is greater than the spacing distance between two adjacent second horn antennas 202.
It is understood that the first feedhorn 102 and the second feedhorn 202 are not fixed to the same position on the upper surface of the metal reflector 30. Since the low frequency unit 10 is more susceptible to interference than the high frequency unit 20, the separation distance between the adjacent two first feedhorns 102 should be controlled to be greater than the separation distance between the adjacent two second feedhorns 202.
In order to maximize the distance between two adjacent first horn antennas 102 and the distance between two adjacent second horn antennas 202, and the distance between two adjacent first horn antennas 102 is greater than the distance between two adjacent second horn antennas 202, the four first horn antennas 102 are respectively fixed at the top corner of the upper surface of the metal reflector 30, and the four second horn antennas 202 are respectively fixed at the midpoint between two adjacent first horn antennas 102.
Similarly, the fixing positions of the first orthogonal polarizer 103 and the second orthogonal polarizer 203 on the lower surface of the metal reflection plate 30 correspond to the fixing positions of the first horn antenna 102 and the second horn antenna 202 on the upper surface of the metal reflection plate 30, respectively, four first orthogonal polarizers 103 are fixed at the top corner positions of the lower surface of the metal reflection plate 30, respectively, and four second orthogonal polarizers 203 are fixed at the midpoint positions between two adjacent first orthogonal polarizers 103, respectively.
The first horn antenna 102 and the second horn antenna 202 are reasonably fixed on the metal reflecting plate 30, namely the low-frequency unit 10 and the high-frequency unit 20 are reasonably fixed, so that the phenomenon of signal interference occurring in a plurality of communication channels is avoided, mutual independence among the plurality of communication channels is ensured, and simultaneous same-frequency transceiving is realized through the plurality of mutually independent communication channels, the channel capacity is further increased, and the communication rate is improved. At the same time, it is beneficial to improve the space utilization of the first waveguide feed interface 104 and the second waveguide feed interface 204.
In the present embodiment, the first waveguide feed interface 104 and the second waveguide feed interface 204 are each made up of two waveguide feed interfaces.
In this embodiment, two waveguide feed interfaces are respectively disposed in the first waveguide feed interface 104 and the second waveguide feed interface 204, so that two signals are obtained by the first waveguide feed interface 104 and two signals are obtained by the second waveguide feed interface 204.
A second embodiment. Please refer to fig. 7.
As shown in fig. 7, the second embodiment provides a communication system applying a multi-channel terahertz antenna, which includes a transmitting end and a receiving end; the transmitting end is provided with a transmitting antenna, and the receiving end is provided with a receiving antenna; wherein the transmitting antenna and the receiving antenna are both multi-channel terahertz antennas as described in the first embodiment; the transmitting antenna is used for transmitting radio frequency signals to the receiving end; the receiving antenna is used for receiving the radio frequency signal.
It should be noted that the four low-frequency units and the four high-frequency units of the transmitting antenna correspond to the four low-frequency units and the four high-frequency units of the receiving antenna one to one.
The embodiment applies the multi-channel terahertz antenna as described in the first embodiment, and can achieve the same beneficial effects.
In summary, the embodiment of the present invention has the following advantages:
the low-frequency unit 10 is obtained by connecting a first microwave lens 101, a first horn antenna 102, a first orthogonal polarizer 103 and a first waveguide feed interface 104 in sequence from top to bottom, the low-frequency unit 20 is obtained by connecting a second microwave lens 201, a second horn antenna 202, a second orthogonal polarizer 203 and a second waveguide feed interface 204 in sequence from top to bottom, and the plurality of low frequency units 10 and the plurality of high frequency units 20 are fixed to the metal reflection plate 30, so as to obtain the multi-channel terahertz antenna, the plurality of low frequency units 10 and the plurality of high frequency units 20 respectively converge the respective transmission signals, reduce the beam width of the respective transmission signals, avoid the signal interference phenomenon of a plurality of communication channels, ensure the mutual independence of the plurality of communication channels, therefore, the simultaneous same-frequency transceiving is realized through a plurality of mutually independent communication channels, the channel capacity is further increased, and the communication rate is improved.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (3)
1. A multi-channel terahertz antenna is characterized by comprising a plurality of low-frequency units, a plurality of high-frequency units and a metal reflecting plate;
the low-frequency unit comprises a first microwave lens, a first horn antenna, a first orthogonal polarizer and a first waveguide feed interface which are sequentially connected from top to bottom;
the high-frequency unit comprises a second microwave lens, a second horn antenna, a second orthogonal polarizer and a second waveguide feed interface which are sequentially connected from top to bottom;
the first horn antenna and the second horn antenna are fixed on the upper surface of the metal reflecting plate;
the first orthogonal polarizer and the second orthogonal polarizer are fixed on the lower surface of the metal reflecting plate;
the first horn antenna and the second horn antenna are fixed at the upper surface of the metal reflecting plate, and the following conditions are met:
the spacing distance between two adjacent first horn antennas reaches the maximum, and the spacing distance between two adjacent second horn antennas reaches the maximum; the spacing distance between two adjacent first horn antennas is greater than that between two adjacent second horn antennas;
and respectively fixing the first horn antennas at the vertex angles of the upper surface of the metal reflecting plate, and respectively fixing the second horn antennas at the midpoint positions between the two adjacent first horn antennas.
2. The multi-channel terahertz antenna of claim 1, wherein the first waveguide feed interface and the second waveguide feed interface are each comprised of two waveguide feed interfaces.
3. A communication system applying a multi-channel terahertz antenna is characterized by comprising a transmitting end and a receiving end; the transmitting end is provided with a transmitting antenna, and the receiving end is provided with a receiving antenna; wherein the transmitting antenna and the receiving antenna are both multi-channel terahertz antennas as claimed in any one of claims 1-2;
the transmitting antenna is used for transmitting radio frequency signals to the receiving end;
the receiving antenna is used for receiving the radio frequency signal.
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| CN202010101611.0A CN111326859B (en) | 2020-02-18 | 2020-02-18 | Multi-channel terahertz antenna and communication system applying same |
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| CN202010101611.0A CN111326859B (en) | 2020-02-18 | 2020-02-18 | Multi-channel terahertz antenna and communication system applying same |
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| CN111326859B true CN111326859B (en) | 2020-10-23 |
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| CN101345332A (en) * | 2007-07-13 | 2009-01-14 | 上海磁浮交通工程技术研究中心 | Vehicle-mounted millimeter wave communication antenna integrating figuration and changed polarization |
| CN102842765A (en) * | 2012-08-30 | 2012-12-26 | 南京信息工程大学 | Novel high-isolation common-frequency dual-polarization horn antenna |
| CN104701634A (en) * | 2015-02-05 | 2015-06-10 | 北京理工大学 | Terahertz quasi-optical power combining and amplifying device |
| CN108134206A (en) * | 2018-01-10 | 2018-06-08 | 重庆邮电大学 | Step ripple Terahertz electromagnetic horn |
| CN209462376U (en) * | 2019-04-23 | 2019-10-01 | 四川众为创通科技有限公司 | Terahertz is same to receive and dispatch full duplex communication system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110032159A1 (en) * | 2009-08-04 | 2011-02-10 | Min-Chung Wu | Antenna Apparatus with Adaptive Polarization Switching Function |
| TWI659624B (en) * | 2017-08-10 | 2019-05-11 | 巽晨國際股份有限公司 | Millimeter wave repeater, millimeter wave transmission system, and millimeter wave transmission method |
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- 2020-02-18 CN CN202010101611.0A patent/CN111326859B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345332A (en) * | 2007-07-13 | 2009-01-14 | 上海磁浮交通工程技术研究中心 | Vehicle-mounted millimeter wave communication antenna integrating figuration and changed polarization |
| CN102842765A (en) * | 2012-08-30 | 2012-12-26 | 南京信息工程大学 | Novel high-isolation common-frequency dual-polarization horn antenna |
| CN104701634A (en) * | 2015-02-05 | 2015-06-10 | 北京理工大学 | Terahertz quasi-optical power combining and amplifying device |
| CN108134206A (en) * | 2018-01-10 | 2018-06-08 | 重庆邮电大学 | Step ripple Terahertz electromagnetic horn |
| CN209462376U (en) * | 2019-04-23 | 2019-10-01 | 四川众为创通科技有限公司 | Terahertz is same to receive and dispatch full duplex communication system |
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